Yahoo – Planning a trip to Vegas to party and strike it rich? Here’s a tip: you’ll have a better chance of winning if you avoid roulette. That’s because casinos have a big advantage in roulette. There are 38 numbers on a standard American roulette wheel: 1 though 36, plus 0 and 00. That means you have a 1 in 38 chance of picking the right number. But, if you bet a dollar and win, you don’t get $38 – you win $35 and keep the original dollar you bet, for a total of $36. That $2 difference between $36…